Picked up an EH Doctor Q Envelope Filter today, haven't had one since my teenage years. What a great pedal, sounds terrific and not only can I be the Funky Meters but it makes for a great set Wah sound all depends on the attack.
I am using it for some great Schenker type tones and totally digging it.
I was playing Meters stuff so I had to break it up. Not a Dead fan at all so not likely I'll do the Jerry thing but I hear a bunch of Steely Dan type tones as well.